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WALLIGK. v BUTTON HOLE ATTACHMENT FOR SEWING MACHINES.

Patented July 9, 1889..

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W. WALLIOK.

BUTTON HOLE ATTACHMENT [FOR SEWING MAGHINES.

No. 406,799. 7 Patented July 9, 1889-.

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W. WALLICK. BUTTON HOLE ATTACHMENT TOR SEWING MACHINES. N0.-406,799.Patented July 9, 1889:.

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W. WALLIGK; I BUTTON HOLE ATTACHMENT FOB. SEWING MACHINES. No. 406.799.Patented July 9, 1889.

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UNITED STATES PATENT OFFICE.

IVASHINGTON \VALLICK, OF PHILADELPHIA, PENNSYLVANIA.

BUTTON-HOLE ATTACHMENT FOR SEWING-MACHINES.

SPECIFICATION forming part Of Letters Patent No. 4:06,?99, dated July 9,1889.

Application filed January 28, 1888. Serial No. 262.198. (N model.)

T0 aZZwhom it may concern.-

Be it known that I, WASHINGTON WALLIoK, a citizen of the United States,and a resident of Philadelphia, Pen nsylvania, have invented certainImprovements in Button-Hole Attachments for Sewing-Machines, of whichthe following is a specification.

My invent-ion relates to a sewing-machine attachment for the automaticsewing of button-holes, the invention consisting of certain features,fully described hereinafter, whereby the formation of a continuousseries of stitches around a button-hole of any ordinary size iseitected, and whereby, also, the length and character of the stitchesproduced may be accurately regulated.

In the accompanying drawings, Figure 1 is a plan View of thesewing-machine attachment complete. Figs. 2, 3, and 4 are similar viewsshowing various parts of the mechanism removed to more fully illustratethose beneath. Fig. 5 is an inverted view of the attachment. Fig. 5%,-is a view of the attachment, partly in elevation and partly inlongitudinal section, on thejline 3 4:, Fig. 1; Fig. 6, a transversesection on the line 1 2, Fig. 1 and Figs. 7 to 15 are detached views ofparts of the mechanism.

The base-plate 1 of the machine has on the under side projectingbinder-lugs 2, (see Fig. 5,) and pivoted to the under side of saidbaseplate, at a point midway between these lugs, is a swingingbinder-cam 3, which has a lug 4, projecting up through a slot 5 in thebaseplate, so that in adapting the attachment to the throat-plate slotof a sewingmachine work-plate the lugs 2 2 will bear against one edge ofsaid throat-plate slot, and the camplate 3 can be adj ust-ed so as tobear against the opposite edge of said slot at a point midway, orthereabout, between the bearings of the lugs 2, a three-point bearingbeing thus produced and the secure confinement of the attachment to thework-plate of the machine effected, irrespective of the width ofthethroatplate slot in said work-plate or any irregularities inalignment of the opposite sides of the slot.

Suitably guided on the base-plate is a primary slide 6, having a slot 7,with which engages the short arm of the primary lever 8, Fig. 1, saidlever being operated by a suitable projection on the needle-bar of themachine, as usual, and being hung to a bracket 9, secured to a stud 10,projecting upward from the base-plate 1 of the attachment. To said studis also hung a pawl-lever 11, the short arm of which engages with arecess in the slide (5, so that as said slide is reciprocated avibrating movement will be imparted to the lever 11, and the pawl 12,carried by the long arm of said lever, will be caused to engage with theteeth of a ratchet-wheel 13, hung to the stud 10 and carrying aspur-wheel 14, which meshes into a spur-wheel 15, turning on a centralstud 16 on the base-plate.

The extent of vibration of the pawl-lever 11 is always uniform; but theextent of movement of the ratchet-wheel 13 and spur-wheels 14 and 15 oneach reciprocation of said lever may be governed by the adjustment of acutoff plate 17, carried by a lever 18, hung to the stud 10, the longarm of this lever having a slot 19, through which passes the stem of aclamping or retaining screw 20, a pointer on the lever serving, inconnection with a graduated scale on the base-plate, toindicate theproper adjustment of said lever.

I-Iung to the stud 10 is another ratchet-wheel 2l,with which engages apawl 22, also carried by the lever 11, the extent of movement impartedto the wheel 21 being governed by a fixed cut-oit plate 23, carried byan arm 24, secured to the upper end of the stud 10, so that on eachvibration of the lever 11 the Wheel 21 will be moved to the extent ofone tooth.

Secured to the ratchet-wheel 21 is a starwheel 25, which acts upon theforks 26 of a vibrator-lever 27, hung to a stud 28 on the base-plate,the movement of the wheel being such that when one for]; is acted uponby a projection of the wheel the other fork will enter a recess in saidwheel, avibrating movement being thus imparted to the lever 27.

Hung to the vibrator-lever 27 by a pin 29 is a vibrator-plate 30, andguided in a slot in this vibratorplate is a slide 32, which has notches33 for the reception of a lug 34 on a locking-bolt 35, hung to thevibrator-plate and having a tongue 36, which may be acted upon by aprojection on a trip-plate 37, so as to throw the lug 34 out ofengagement with the notches 33, as shown in Figs. 1, 2, and 3, the lugbeing normally held in engagement with one or other of said notches,however, by the action of a spring 38, so as to lock the slide 32 to thevibrator-plate.

A bolt 63 passes through and is adjustable laterally in a transverseslot in the slide 32 and a like slot in an eccentric 64, which islocated beneath the "ibrator-plate and is hung thereto by a pin 66,thestrap of said eccentric being connected to a pin 31 on a link 39,pivoted to the base-plate, as shown in Fig. 4.

Parallel slots in the link an d in the clampplate 40 receive pins 44 ona bar41,which has a series of openings 42, any one of which may receivea pivot-pin 43, the clamp carrying plate 40 being hung to a pivot-stud46 on the base-plate of the attachment, which stud fits snugly in alongitudinal slot 75 in the clampplate, whereby the latter may beshifted longitudinally, or traversed, as I term it, without interferingwith its vibratory movement.

The movement of the vibrator-plate is, it will be observed, transmittedto the clampplate through the medium of the vibratorslide 32, eccentric64, link 30, and regulator 41; hence by adjusting the latter so as tocarry its pins 44 nearer to or farther from the fulcrum of theclamp-plate the extent of the short and rapid vibratory movements of thelatter, which I call the stitch-vibrations, can be readily andaccurately governed and the size of the stitches thus regulated.

Secured to the hub of-the spur-wheel 15 are two cams 47 and 48, which Iterm, respectively, the shifter-cam and the traverse-cam, and both ofthese cams act upon a shifterframe 50, the cam 47 acting upon theopposite side bars of said frame to effect lateral movement of the same,and the cam 48 acting upon opposite projections 51 on the frame toimpart a longitudinal movement thereto, this longitudinal or traversemovement being for the purpose of determining the length of thebutton-hole, and the lateral movement being for the purpose of carryingthe stitches across and around the ends of the button-hole, whichmovement I term the side-to-side vibration.

The frame is hung by a pin 49 to an arm 53, which I term thetraverse-arm, said arm being pivotedto a stud 54 on the baseplate andhaving a slot 55, which receives a pin 56, projecting from atraverse-regulating bar 57, said bar having a slot 58 for the receptionof the pivot-stud of the arm 53, whercby the bar can be adjustedlongitudinallyin respect to the pivot of said arm.

The pin 56 of the bar 57 also enters a transverse slot 60 in theclamp-plate 40; hence it will be seen that by longitudinally adjustingsaid bar 57, and thus shifting the pin 56 of the same nearer to orfarther from the fulcrum of the arm 53, the extent of longitudinal ortraverse movement imparted to the clampplate can be readily governed tosuit the length of button-hole to be sewed, the bar 5'7 being providedwith a graduated scale, as shown in Fig. 4, to facilitate the properadjustment of the same.

It will thus be seen that the scale on the traverse regulating bar 57determines the length of button-hole, while the scale for the lever 18regulates the spacing of the stitches, so that by adjusting the bar andthe lever to the corresponding graduation on each scale the spacing ofthe stitches will be made to accord properly with the length of thebuttonhole, the stitches being uniformly spaced whether the button-holeis long or short.

The transverse slot 60, for engagement with the traverse mechanism, isformed in a plate located above that portion of the clamp-plate whichcontains the longitudinal slot 75, for the reception of the pivot-stud46, so that the two slots cross each other. By this means I am enabledto make the clamp-plate, and consequently the whole attachment, muchshorter than it would have to be if the transverse slot were formed inthe clamp-plate at the end of the longitudinal slot 75.

During the time that the clamp-plate is receiving the side-to-sidevibration, so as to carry the stitches around the ends of the button-holefrom one side of the same to the other, said clamp-plate shouldbe released from the control of the vibrator-plate 30; henceI form inthe shifter-frame 50 a slot 61, with which engages a lug 62, projectingfrom the upper face of the trip-plate 37, so that as soon as theshifter-frame commences to move crosswise under the influence of the cam47 the tripplate 37 will also be moved and the pin on the under side ofthe same will act on the bolt 35, so that, as shown in Figs. 1,2, and 3,it will withdraw the lug 34 from the lockingnotch of the slide 32, whichit had previously occupied, as shown in Fig. 7, the slide being therebyreleased from the control of the vibrator-plate.

In order now to impart the side-to-side movement to the clamp-plate, thevibratorslide must be moved so as to actuate the vibrator-eccentric 64,link 39, and bar 41, and thus move the clamp-plate. To effect thismovement of the slide, the latter has a pin 65,

which enters the slot 61 of the shifter-frame,

but is considerably less in width than the same, so as to permit thelost motion necessary in order to insure the previous operation of thetrip-plate 37 and moving back of the bolt 35. As soon as the bolt isretracted, 110wever, the shifter-frame acts on the pin 65 and shifts theslide, say, from the position shown in Fig. 7 to that shown in Fig.8,the movement being transmitted to the clamp-plate by the mechanism justdescribed.

If all button-holes were of the same width, the vibrator-slide might beconnected directly to the link 39; but as the holes vary in width Iprovide the slots in the vibrator-slide and eccentric for the receptionof the bolt 63, by adjusting which nearer to or farther from the fulcrumof the eccentric the throw of the latter may be Varied, as will bereadily understood.

It will be evident, that a simple arm or equivalent devicesuch, forinstance, as the arm 76 in Fig. l5-might be substituted for theeccentric; hence in the term eccentric I include any such modification.

While the clamp-plate is having the sideto-side movement imparted to itthere should preferably be a series of short longitudinal or stitchvibrations imparted thereto in order to dispose the stitches radiallyaround the ends of the button-hole, and for this reason the under sideof the shifter-frame 50 has a stud 52, which projects 'into a slot 68 inthe vibrator-lever 27, this slot having opposite inclined sides andstraight end portions, as shown in Figs. 1, 2, and 3, so that when thepin 52 is traversing said end portions of the slot longitudinal movementwill be imparted to the shifter-frame 50, and thence, through the mediumof the arm 53 and bar 57, to the clamp-plate, While when the pin istraversing the side portions of the slot no such longitudinal movementwill be imparted thereto, as the pin will not be affected by thevibrations of the lever 27.

Having thus described my invention, What I claim, and desire to secureby Letters Patent, is

1. The combination of the clamp-plate having a transverse slot, thetraversing cam for said plate, transmitting mechanism comprising aslotted and pivoted traverse-arm and a traverse-regulating bar slottedto receive the pivot-pin and having pins entering the slots of theclamp-plate and traverse-arm, ratchet mechanism for operating thetraverse-cam, a stop-plate and regulating-lever, whereby the extent ofmovement of thei-ratchet is controlled, and graduated scales, wherebycorrespondin g adjustments of said regulating-lever andtraverse-governing bar are facilitated, all substantially as specified.

2. The combination of the clamp-plate, th shifter-frame, and thetraverse-cam for operating the latter with connecting devices comprisinga slotted and pivoted traverse-arm connected to the frame and atraverse-regulatin g bar adjustable longitudinally in respect to itsfulcrum, said bar being connected to the clamp-plate and having a pinengaging the slot in the pivoted traverse-arm, all substantially asspecified.

3. The combination of the clamp-plate, the vibrator-lever having aportion swinging longitudinally or in the same direction as the traversemotion of the clamp-plate, the shiftercam, the shifter-frame connectedto the clampplate, a pin carried by said frame, and a slot formed in thelongitudinally-moving portion of the vibrator-lever for the reception ofsaid pin, said slot comprising opposite longitudinal side portions andtransverse end portions, whereby the shifter-frame is brought undercontrol of the vibrator-lever while said frame isbeing shiftedlaterally, all substantially as specified.

4. The combination of the clamp-plate, the Vibrator -lever, thevibratorplate, the vibrator-slide guided in the plate, the lever andbolt for locking said slide to the vibratorplate, the trip-plate havinga lug for acting on the locking-bolt lever, the shifter-frame engagingwith projections on said trip-plate and vibrator-slide, and means forconnecting the vibrator-slide to the clamp-plate, all substantially asspecified.

5. The combination of the pivoted clampplate, the vibrator-plate andmeans for operating the latter, a transmitter-link 39, connected to thevibrator-plate, alongitudinallyadjustable regulating-bar, andslot-and-pin connections between said regulating-bar and the clamp-plateand transmitter-link, all substantially as specified.

6. The combination of the clamp-plate, the vibrator-lever, thevibrator-plate, the vibrator-slide, the lever hung to the vibratorplateand having a locking-bolt for the slide, the trip-plate for the lever,the shifter-frame engaging with projections on said trip-plate andvibrator-slide, the eccentric hung to the vibrator-plate, a connectionbetween the vibrator-slide and eccentric adjustable from and toward thefulcrum of the latter, and means for connecting the eccentric to theclamp-plate, all substantially as specified.

7. The combination of the traversing mechanism for the clamp-plate witha pivotstud and a clamp-plate having a longitudinal slot for thereception of said pivot-stud, and a transverse slot for engagement withthe traversing mechanism, said transverse slot being formed in a portionof the plate located above and crossing the longitudinal pivot-slot, all7 substantially as specified.

In testimonywhereof I have signed my name to this specification in thepresence of two subscribing witnesses.

WASIIINGTON \VALLICK.

Witnesses:

WILLIAM D. CoNNER, HARRY SMITH.

